{"product_id":"kennametal-3751945-cnmg431fn-kck05-turning-insert-carbide","title":"Kennametal 3751945 CNMG431FN KCK05 Turning Insert Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 3751945 is a solid carbide turning insert in the CNMG431FN geometry, grade KCK05, designed for high-wear-resistance machining of steel and cast iron. It carries a multilayer CVD coating of TiCN and Al2O3 applied by MTCVD process, delivering thermal resistance and edge retention in finishing operations. The insert measures 12.90 mm in length with a 0.5 inch inscribed circle and a 1\/64 inch corner radius. It features a negative rake angle of 10 degrees, a honed cutting edge, and four usable cutting edges. Licensed machinists, CNC operators, and toolroom technicians install this insert in KENLOC-compatible toolholders for production turning, facing, and boring applications.\u003c\/p\u003e\u003cp\u003eThis insert is suited for finishing cuts on steel and cast iron workpieces in both CNC turning centers and manual lathes equipped with compatible KENLOC-series toolholders. The FN chip breaker geometry is optimized for finishing operations where controlled chip flow and consistent surface finish are required. The maximum depth of cut is 1.25 mm (0.0492 inches), confirming its role as a light-engagement finishing insert. It is classified under ANSI insert code CNMG431 and ISO insert code CNMG120404, making it straightforward to cross-reference against standard toolholder catalogs. The insert is compatible with both clamp and pin holding methods, adding flexibility in toolholder selection.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eKCK05 grade with multilayer CVD TiCN and Al2O3 coating for high wear resistance on steel (P) and cast iron (K) workpiece materials\u003c\/li\u003e\n\u003cli\u003eFN chip breaker geometry engineered for finishing operations with controlled chip evacuation\u003c\/li\u003e\n\u003cli\u003eFour usable cutting edges per insert for extended tool life and cost efficiency\u003c\/li\u003e\n\u003cli\u003eNegative rake, negative side clearance (N clearance code) geometry for stable clamping in KENLOC toolholders\u003c\/li\u003e\n\u003cli\u003eHoned cutting edge style reduces micro-chipping during light finishing passes\u003c\/li\u003e\n\u003cli\u003eCompatible with clamp and pin insert-holding methods for broad toolholder compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in KENLOC-series toolholders accepting CNMG431 (ISO CNMG120404) insert geometry with clamp or pin holding. Suitable for turning, facing, and boring applications on steel and cast iron workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed by a qualified machinist or CNC toolroom technician. Power down and lock out the machine spindle before changing inserts. Use the correct torx or insert-clamp screw driver as specified by the toolholder manufacturer  -  do not overtighten the clamp, as this can fracture the carbide substrate. Inspect the toolholder pocket and locating pin for wear or debris before seating the insert, and verify that the insert is fully seated before resuming cuts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: CNMG431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: CNMG120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCK05\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN and Al2O3 (Multilayer CVD, MTCVD Process)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: C - Diamond (Rhombic) 80 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 12.90 mm (0.5077 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inches (3\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 1\/64 inches (0.0156 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 0.2031 inches (5.16 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 1.25 mm (0.0492 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 10 degrees (Negative)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: FN (Finishing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel (P), Cast Iron (K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENLOC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3751945\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51740342485298,"sku":"3751945","price":182.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8545e04f1695238dbe606af3f080ce67.jpg?v=1788824446","url":"https:\/\/voomisupply.com\/products\/kennametal-3751945-cnmg431fn-kck05-turning-insert-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}